These polyurethane chairs adjust to fit most body types and workstations. Optional 6-way adjustable armrests support a variety of arm placements for proper ergonomics. These polyurethane chairs are easily cleaned, making them ideal for almost any environment. Choose from rolling, non-marring casters (suitable for both hard and carpeted floors) non-marring ball glides (suitable for both hard and carpeted floors) on a nylon-reinforced fiberglass base. Optional seat tilt provides 8 forward and 3 backward locking tilts for ergonomic posture support. Foot rings are in nylon reinforced fiberglass.